Questions tagged [cpu]
CPU stands for Central Processing Unit, and is the main processing chip used in every computer. Brands include Intel, AMD and ARM. CPUs are commonly available in 32- and 64-bit, and come in a variety of frequencies or with multiple cores.
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Freezing Ubuntu: RAM fully used and CPU all busy, but active processes don't add up to more than 15% CPU capacity
I have just surface level knowledge about hardware and Ubuntu, so please correct me if I say anything wrong or unlikely.
Since January, I am using a used Dell Latitude 7490. I brought my old laptop (...
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cpu high usage problems on ubuntu 23.10
I have recently upgraded to ubuntu 23.10, and have noticed some weird performance problems.
When idling, my system seems fine, however as soon as I started using my mouse, the gnome-shell's cpu usage ...
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What do the CPU usage numbers in plasma-systemmonitor mean and why are they so high?
When opening plasma-systemmonitor I get really weird CPU usage numbers that total to more than 100%. I tried to show all kinds of different CPU usages but I can't seem to find the one that shows the ...
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Very low video quality in Zoom with 100% cpu usage
The video signal is great in my self-view when I open zoom or in the video settings preview.
But for other meeting guests the recording is very low quality.
The reason is the 100% CPU usage of the ...
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How do I stop the CPU from throttling?
A little background first: (Maybe a little longwinded)
Ubuntu 22.04.4 LTS [5.15.0-101-generic|libc 2.35]
Gigabyte B550M K using optimum BIOS settings, 32GB, Noctua DH-15 cooler (2 fans), basic video ...
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Ubuntu won't boot on high CPU freqs
I've recently built my new PC. I was trying to install Ubntu 23.10 but installer was always producing random errors on the middle of instalation. After investigation, I managed to install Ubuntu but I ...
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swapd trigger 300%+ cpu usage [closed]
I am experiencing high cpu usage for swapd. Tried to upgrade the spec from 4GB ram to 8GB ram and 2vCPU to 4 vCPU
Here is the top result
top
And this is the free -h result free-h
I tried to figure out ...
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Ubuntu systemd cpu usage 100% timezone
We found CPU usage of 99% by systemd on Ubuntu 22.04.1. It has something to do with the daylight-saving time switch.
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Unlocking max power on i7 12800H
I have an i7 12800H processor that should be boosting to over 100W of power, but it never goes above 45W as per turbostat. The fans of the computer don't even spin up.
This is what I get from powercap-...
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How can I remove turbo-boost from an AMD processor?
I have been trying different ways, there are certain extensions but with my laptop are not compatible, my laptop is a legion 5, I have come to the conclusion that it is not possible and I thought that ...
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Ubuntu system showing 100% CPU usage with no identifiable processes consuming CPU resources
I'm experiencing an issue on my Ubuntu system where the CPU usage consistently shows 100% utilization in system monitoring tools like top or htop. However, when I inspect the running processes, I can'...
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Chrome Browser consuming CPU in Lununtu
I have been running Lubuntu on one computer for a few years. Performance has really degraded over the last few months and when I run the qps monitor, I see chrome consuming most of the CPU. When idle ...
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CPU not using all threads
CPU monitor
Terminal
For some reason my cpu is only using 2 threads when starting a game/process. rest of the threads just stays unused, The cores and threads are all enabled. I configured my power ...
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High CPU usage in whm without any real user
I'm experiencing high CPU usage on one of my cPanel-hosted websites despite having no active users according to Google Analytics. When checking with 'htop' in the shell, I noticed that the process '...
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KVM not supported shown in terminal while it is enabled
Can you let me know what I am doing wrong to install the KVM in Virtual Machine Ubuntu that I see the error of "CPU does not support KVM extensions"?
I am running a Linux (Ubuntu 22.04.3 LTS)...
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Flickering display on Ubuntu 22.04.3 when intense CPU usage
I am the happy owner of a Dell Precision 5540 with Ubuntu LTS since end 2020. Everything was going perfectly well until 2-3 weeks ago. Now when I have intense CPU usage (data analysis, or Kerbal Space ...
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Apache server unresponsive due to multiple instances of process
Good day,
I have a VPS server with LAMP setup. As a couple of days I have a huge spike in process and
I don't know how to investigate this cause.
Here is the output of the htop command https://ibb.co/...
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Setting CPU frequencies with cpupower has no effect
I tried it on desktop Ubuntu 22.04.3, 23.10, regular and lowlatency versions. I have to increase the minimum frequency of a core, which runs an image capture process requiring high CPU clock. Here is ...
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Keep CPU under a certain temperature
Distro & Computer: Ubuntu 23.10, but I am willing to switch distros. Acer ultralight laptop with AMD 7735U processor.
Is there a way to throttle the CPU based on temperature? Whenever the computer ...
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How to isolate cpu and ram for specific task. I already use "isolcpus" in the Grub setting to limit my CPU, but it does not get desired result
The main issue is to calculate the execution time of my algorithm, which is run in Python, and get a fixed execution time for each execution of the algorithm on the same data. I use the same data on ...
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How to get logs/evidence of illegal hardware changes during laptop repairs
I'm on Ubuntu 20.04. I sent my laptop for repair and I find out that the CPU has been changed to a cheaper version without my consent (and I was not requesting to fix the cpu at all!), basically from ...
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Constant CPU Frequency at Base 1.1 GHz on Intel Pentium Silver N5000
I'm experiencing an issue with my ASUS x507ma laptop, which is equipped with an Intel Pentium Silver N5000 (Gemini Lake) processor. On various Linux distributions such as Ubuntu, CentOS, or Debian, ...
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Dock extension causing high gnome-shell CPU usage
I am running Ubuntu 22.04.3 LTS on a Dell XPS13.
Ever since upgrading to 22.04, I've had trouble with gnome-shell using excessive amounts of CPU (upwards of 80-90%). In order to pinpoint the problem, ...
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Why am i having multiple (40 or 50) instances of game servers when i type htop?
Hi this is my first post, thanks for taking the time to view/assist.
Hypervisor: Proxmox
VM OS: Ubuntu (headless)22.04.3
Here is the issue.
I'm running a game server and noticed an unusual large spike ...
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Measuring Percentage using Pressure Stall Information (PSI)
Can I measure the percentage using the PSI of CPU stall time? the command gives the percentage for 10, 60, and 300 sec. However, I am using the total field of it. how to calculate the percentage of ...
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indicator-cpufreq unable to choose powersave
I'm on Lenovo G50 laptop, Lubuntu 22.04. I installed indicator-cpufreq.
When I run it (I'm using i3) I'm unable to switch it to powersave.
It always switches back to performance.
Can I fix it?
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What in Kubuntu could be limiting available cpu cores? (only half are utilized in Plasma)
I am running Kubuntu 22.04.3 LTS on a 12-core/24-thread AMD Ryzen 5900X.
The problem I am having is that many tasks running in KDE/plasma appear to be limited by CPU affinity to only 12 of the 24 ...
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Regarding the bug message when installing Ubuntu 20.04.6
Physical machine configuration:
cpu:i7-6700k
Motherboard: Gigabyte B150M-VP
Motherboard bios version: F1
Memory: Kingston 16G 2133hz
Storage: Kingston SSD512G
When I used a USB flash drive to install ...
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taskset dose not change CPU allocated to process
I changed CPU affinity of a process with taskset
sudo taskset -cp 0-10 2275
pid 2275's current affinity list: 0-10
but PSR of this process dosn't changed
ps -o psr -p 2275
PSR
51
as I know after ...
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MOUNT.NTFS consuming almost 100% CPU when sf2 or sfz file loaded on Bitwig Studio 5.0 from internal SSD
MOUNT.NTFS process is consuming almost 100% CPU when sf2 or sfz file is loaded on Bitwig Studio 5.0 from an internal SSD. Not just for files which are big but even for small files like 10 MB, MOUNT....
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How can I track down seeming performance issue
I have two similar laptops, both thinkpad P series. I will outline their specs:
New Laptop:
Intel(R) Core(TM) i7-12850HX (16 core 24 thread)
128GB DDR5, 4TB SSD (2x2TB)
Ubuntu 22.04.3 LTS
Old Laptop:...
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Case and CPU fans would randomly spin slowly or stopping alltogether
My case and CPU fans would randomly stop spinning, or spin down (few hundred RPM) then stopping completely. It occurs every few days, the most recent event occurred approximately 1hr after resuming ...
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why does Ubuntu throttle my CPU 9° sooner than what crit says?
When stress testing with mprime small FFTs the CPU temperatures should reach at least 95°C, but they appear to get throttled at approx 89°C even though sensors correctly report that the "crit&...
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This simple script chewed up a lot of CPU, why?
I have a remote machine I need to keep an eye on. It's running Ubuntu Studio 22.04 (KDE Plasma). A few weeks ago it crashed and journalctl showed a "Bug" that occurred a couple minutes ...
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Network interface interupt binding not working as expected
I am on Ubuntu 20.04.6 LTS, numa with 2 node, each node has 64 physical cores.
I have bind all interrupt for a network interface on cpu 64, 65, as lspci -vvvs <bus-info> shows my network ...
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dmidecode and GNU parallel not seeing cores
We are upgrading from Ubuntu 18.04 to 22.04 on an m5a.large system in AWS (two vCPUs). We installed GNU Parallel from the Ubuntu repos.
On Ubuntu 18.04:
# parallel --number-of-cores
2
On Ubuntu 22.04:...
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Why sum of this process CPU(%) is not equal to total cpu(%) utilisation in top output
In the attached image of top command output, you can see the idle is 53.3% means CPU utilization is 52.7% but, sum of CPU% of all the process listed (Image cropped for CPU% > 0.0) is more than the ...
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Ubuntu 22.04 which sensor temperature is the CPU? [duplicate]
The sensors command lists the temperature of various components in the system, but which one is the CPU? How to link these labels with system components?
sensors
...
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How to tune CPU Usage granularity?
It is about getrusage.
It works well but precision/granularity is not precise enough.
It does not depend on CPU and its performance. Depends on kernel only.
For actual kernel 4+ the precision is 3800 ...
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Upgrading CPU made Ubuntu slow
I upgraded cpu 3900x to 5950x and the main Ubuntu 20 guest machine I am using became slow. I see tearing when dragging window.
I have 128GB of ram 80dedicated to this guest. Storage is on NVME.
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ASUS Vivobook 14 Overheating Issue on Ubuntu 22.04 with Ryzen 7
I'm encountering an issue with my ASUS Vivobook 14 M1402IA-AM173 running Ubuntu, equipped with 16GB RAM and a Ryzen 7 4800Hs processor. Just to clarify, I'm using the default power management settings....
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Can't get CPU temperature
I'm having trouble getting the temperature of the CPU.
I tried using lm-sensors, but it does not find any module (I did the configuration and kmod start).
I checked the local files located here: /sys/...
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How cpu core frequencies, percentage cpu and memory utilization, processing load and temperature affect app performance?
I am trying to benchmark two machines for my app.
Two machines differ mainly in their peripheral connections and have same processor, memory and secondary storage.
I did four different types of runs:
...
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fsicapd command has high cpu load while idle
The CPU load of my computer is high without me doing any major activity (even if I am not using it at all). The computer fan is running at high power to try to cool down the computer.
When I check ...
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Why my CPU frequencies high but application performance is poor
I have two similar raspberry pi running Ubuntu with little difference in their configuration. I am trying to monitor their performance for running my application. So I am running my app on both ...
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cpufreq-set not taking effect on fixing CPU frequency on ubuntu 20
I need to set a fixed frequency on my CPUs for a research project.
I'm using Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-155-generic x86_64) and an intel CPU Xeon W-2155 3.3GHz.
I'm trying to use the ...
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Ubuntu 22.04: xfce4-panel shows high cpu, possible fix?
When using xfce as GUI for ubuntu 22.04 I sometimes get high CPU usage according to htop, sometimes over 60%.
I use Ubuntu 22.04LTS and xfce4-panel 4.16.3 (Xfce 4.16)
I have searched the internet, but ...
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Ubuntu 22.04 : Laptop don't wake up after suspend
I have a problem on an Asus VivoBook 17 on Ubuntu 22.04 (clean install)
Everything seems to work fine, except suspend mode : after, the computer doesn't want to do anything : black screen (as in ...
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Explain different sensor on psensor
What sensor here shows the GPU temperature? I figured Tctl and Tccd1 is CPU, but I could not find online what the other sensors are for. I would greatly appreciate if someone could explain them in ...
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Ubuntu 22.04 - CPU constantly running too hot at 90°C
the output of sensors is constantly looking something like this with regular spikes over 90°C or 95°C for multiple seconds.
This does not seem healthy for the life of the CPU.
I am using a ThinkBook ...
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